WO2019080627A1 - 防偷窥装置、防偷窥显示器及控制方法 - Google Patents

防偷窥装置、防偷窥显示器及控制方法

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Publication number
WO2019080627A1
WO2019080627A1 PCT/CN2018/102171 CN2018102171W WO2019080627A1 WO 2019080627 A1 WO2019080627 A1 WO 2019080627A1 CN 2018102171 W CN2018102171 W CN 2018102171W WO 2019080627 A1 WO2019080627 A1 WO 2019080627A1
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WO
WIPO (PCT)
Prior art keywords
mirror structure
peeping
display
display panel
light
Prior art date
Application number
PCT/CN2018/102171
Other languages
English (en)
French (fr)
Inventor
王宇鹏
王建俊
闫立东
张吉亮
Original Assignee
京东方科技集团股份有限公司
北京京东方显示技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 京东方科技集团股份有限公司, 北京京东方显示技术有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US16/338,000 priority Critical patent/US10948750B2/en
Publication of WO2019080627A1 publication Critical patent/WO2019080627A1/zh

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/1323—Arrangements for providing a switchable viewing angle
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133553—Reflecting elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/13356—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements
    • G02F1/133562—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements on the viewer side
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/30—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 grating
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/30—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 grating
    • G02F2201/307—Reflective grating, i.e. Bragg grating

Definitions

  • the present disclosure relates to the field of display, and in particular to an anti-peeping device, an anti-peeping display, and a control method.
  • smart displays are applied in many aspects of the user's daily life, such as touch screen mobile phones, touch screen televisions, ATM machines (automatic teller machines) and the like.
  • the birth of the intelligent display also brings various conveniences to the user, for example, enabling the user to perform some related operations autonomously; for example, making the display itself thinner and more beautiful, for example, a touch screen mobile phone, a tablet computer, and the like.
  • Embodiments of the present disclosure provide an anti-peeping device comprising: an external light source and a grid mirror structure, and a first controller coupled to the grid mirror structure.
  • An external light source is configured to emit light toward the grating mirror structure, the first controller being configured to control rotation of the grating mirror structure such that light emitted by the external light source toward the grating mirror structure is The mirror structure is reflected to a first direction that is offset from the normal to the horizontal plane in which the grating mirror structure is located.
  • the side of the grating mirror structure adjacent to the external light source is a light reflecting surface.
  • an anti-peeping display comprising: a display panel for displaying an image; and an anti-peeping device as described in the foregoing embodiments.
  • the grating mirror structure is attached to the display panel and covers at least a portion of the light emitting surface of the display panel, the external light source of the anti-peeping device is independent of the display panel, and the connecting line of the external light source and the display panel and the light emitting
  • the angle between the normals of the faces along the light exiting direction is no more than 90 degrees, and the orthographic projection of the external light source on the plane of the light exiting surface does not overlap the light exiting surface.
  • the display panel is a liquid crystal display panel
  • the anti-peeping display further includes a cover glass layer outside the polarizing plate of the liquid crystal display panel
  • the gate mirror structure is disposed on the polarizing plate and the cover glass layer. between.
  • the anti-peeping display includes two external light sources and two grid-type mirror structures respectively covering the two side portions of the light-emitting surface of the display panel opposite to each other, and The middle portion of the light-emitting surface of the display panel is not covered.
  • Two external light sources are positioned to illuminate the two grating mirror structures, respectively.
  • the two grating mirror structures occupy between one quarter and one half of the light emitting area of the illuminating surface of the anti-peeping display.
  • the width of each of the grating mirror structures is between one quarter and one half of the width of the illumination area of the anti-peep display.
  • the external light source is configured such that a ratio between a brightness of light emerging from the polarizing plate and a brightness of the external light source is less than a threshold.
  • an anti-peeping device comprising: a grid mirror structure and a second controller coupled to the grid mirror structure, the grid mirror structure being configured to be protected
  • the gliding time is controlled by the second controller to be in a closed state to block light emitted from the lower portion of the grating mirror structure from being emitted from the grating mirror structure.
  • an anti-peeping display including: a display panel for displaying an image; and an anti-peeping device as described in the previous embodiment, the grating mirror structure being attached to the display panel And covering at least a portion of the light emitting surface of the display panel.
  • the display panel includes a liquid crystal layer, a backlight, and at least two light transmissive layers located on the liquid crystal layer away from the backlight, wherein the gate mirror structure in the anti-peeping device is disposed on any two Between the light transmissive layers.
  • one side of the grid mirror structure is a matte structure.
  • the anti-peeping display includes two grid-type mirror structures respectively covering two side portions of the light-emitting surface of the display panel opposite to each other without covering the The middle portion of the light exit surface of the display panel.
  • the backlight is configured to increase brightness correspondingly according to a ratio of the size of the grid-type mirror structure in the closed state to the light-emitting area of the light-emitting surface of the display panel.
  • a further embodiment of the present disclosure provides a control method based on the anti-peeping device or the anti-peeping display according to the above embodiment, comprising: controlling the rotation of the grating mirror structure in the anti-peeping device by the first controller a method of causing the external light source to emit light toward the grating mirror structure to be reflected by the grating mirror structure to a first direction, the first direction being offset from a horizontal plane of the grating mirror structure line.
  • control method may be based on an anti-peeping device or an anti-peeping display having a different structure, in which case the control method comprises: controlling, by the second controller, the grating mirror structure in the anti-peeping device to be closed a state in which light rays emerging from the lower side of the grating mirror structure are prevented from being emitted from the grating mirror structure.
  • the controlling method further comprises: increasing a brightness of the display panel according to a size ratio of the closed mirror-shaped mirror structure to the light-emitting area of the light-emitting surface of the display panel.
  • FIG. 1 is a schematic structural diagram of an anti-peeping device according to an embodiment of the present disclosure
  • FIG. 2 is a schematic structural diagram of an anti-peeping display according to an embodiment of the present disclosure
  • FIG. 3 is a schematic structural diagram of an anti-peeping display according to another embodiment of the present disclosure.
  • FIG. 4 is a schematic structural diagram of an anti-peeping device according to another embodiment of the present disclosure.
  • FIG. 5 is a schematic structural diagram of an anti-peeping display according to another embodiment of the present disclosure.
  • an anti-peeping display film may be attached to the surface of the display.
  • the production of such an anti-peeping display film requires a relatively high cost, and this cost also increases as the display area of the display device increases.
  • the attachment of such a voyeur display film to the display may have an effect on the normal display effect of the display device.
  • FIG. 1 is a schematic structural diagram of an anti-peeping device according to an embodiment of the present disclosure.
  • the anti-peeping device specifically includes the following components: an external light source 101 and a grating mirror structure 102, and is coupled to the grating mirror structure 102.
  • the first controller (not shown in Figure 1).
  • the external light source 101 is configured to emit light toward the grating mirror structure
  • the first controller is configured to control the rotation of the grating mirror structure 102 such that the light emitted by the external light source toward the grating mirror structure is The mirror structure is reflected to a first direction that is offset from the normal to the horizontal plane in which the grating mirror structure is located.
  • the normal direction of the horizontal plane where the grating mirror structure is located is the vertical direction in FIG. 1, and therefore, the first direction is deviated from the vertical direction, and this direction is usually It is also the location where the voyeur is located, because the voyeur is generally on the side of the normal user. Accordingly, the light emitted by the external light source 101 toward the grating mirror structure 102 can be reflected by the gate mirror structure to the voyeur (eg, the spectator's eye B schematically shown in FIG. 1).
  • a gate-type mirror structure refers to an optical structure composed of a plurality of optical elements having reflection characteristics spaced apart from each other with a gap therebetween.
  • Several optical elements are schematically illustrated in Figure 1 in thick solid lines. It can be appreciated that the optical component includes, but is not limited to, a flat mirror.
  • the first controller includes a control circuit, a motor, and a support structure for supporting the grating mirror structure, the motor being coupled to the support structure.
  • the motor can be rotated by the signal from the control circuit to drive the deflection of the grating mirror structure via the support structure.
  • the first controller can control the direction and magnitude of rotation of the grating mirror structure to control the direction of the reflected light of the grating mirror structure.
  • the side of the grating mirror structure 102 adjacent to the external light source 101 is a light reflecting surface.
  • the grating mirror structure 102 can be first controlled by the first controller such that the light reflecting surface thereof faces the external light source, and the light emitted by the external light source 101 is irradiated to the grating mirror structure 102, and the grating mirror surface is Structure 102 reflects the light and the reflected light enters the peeper's eyes.
  • the voyeur will not see the display content of the display to which the anti-peeping device is applied, thereby achieving the anti-peeping effect.
  • an embodiment of the present disclosure further provides an anti-peeping display device, which specifically includes the following components: a display panel for displaying an image and an anti-peeping device as described in the foregoing embodiments.
  • the grating mirror structure is attached to the display panel and covers at least a portion of the light emitting surface of the display panel, and the external light source of the anti-peeping device is independent of the display panel and above the light emitting surface of the display panel.
  • the display panel includes, but is not limited to, a liquid crystal display panel and an organic light emitting diode display panel.
  • the anti-peeping display is a liquid crystal display including a backlight, a liquid crystal layer, and a polarizing plate 104.
  • the anti-peeping display further includes a cover glass layer 103 disposed between the polarizing plate 104 and the cover glass layer 103, the external light source 101 is independent of the liquid crystal display panel, and the position of the external light source Not less than the light exit surface of the display panel.
  • the side of the grating mirror structure 102 remote from the backlight is a mirror structure capable of emitting light, and the other side adjacent to the backlight is a frosted structure.
  • the arrangement of the grating mirror structure is not limited to the example shown in FIG. 2, and the grating mirror structure may be disposed at any appropriate position of the liquid crystal display panel as long as it is not on the light path from the grating mirror structure to the light exit surface of the anti-peep monitor. There is a light shielding layer. According to another embodiment of the present disclosure, as shown in FIG.
  • the anti-peeping display includes two external light sources 101 and two sets of grating mirror structures 102, and the two sets of grating mirror structures 102 respectively cover the light emitting surfaces of the display panel.
  • the opposite side portions (for example, the left side portion and the right side portion shown in FIG. 3) do not cover the intermediate portion of the light exiting surface of the display panel.
  • the two external light sources 101 are respectively disposed at the upper left and upper right of the light emitting surface of the display panel.
  • the gate mirror structure 102 can be disposed under the cover glass layer 103.
  • the left side portion and the right side portion of the polarizer of the liquid crystal display panel are provided with a gate mirror structure, and in the two sets of grating mirror structures An external light source is provided above.
  • the first mirror can make the grating mirror structure of the left side portion and the right side portion of the light emitting surface of the display in an appropriate deflection state. In order to reflect the light from the two external light sources separately, the reflected light enters the eyes of the voyeur, thereby achieving the effect of preventing voyeurism.
  • an anti-peeping area is formed on the left and right sides of the display, and the voyeurs located on the left and right sides of the light-emitting surface of the display cannot clearly see the content displayed on the display, thereby further enhancing the anti-peeping effect.
  • the external light source of the anti-peeping device 101 is independent of the display panel, and the connecting line between the external light source 101 and the display panel and the light emitting surface of the display panel are along The angle between the normals of the light-emitting direction is not more than 90 degrees, and the orthographic projection of the external light source on the plane of the light-emitting surface does not overlap with the light-emitting surface.
  • the two sets of grating mirror structures occupy between one quarter and one half of the light emitting area of the light exiting surface of the anti-peep monitor.
  • the width of each of the grating mirror structures is one-quarter to one-half the width of the light-emitting area of the illuminating surface of the sneak-proof display.
  • “width” refers to the size of the light-emitting area of the grating-type mirror structure or the illuminating surface of the anti-peeping display in the same direction after the grating mirror structure is mounted on the display, for example, for the example of FIG.
  • the width refers to the size of the grating-type mirror structure or the illuminating area of the illuminating surface of the anti-peeping display in the horizontal direction.
  • the ratio of the grating mirror structure to the light-emitting area of the light-emitting surface of the display can be set according to actual needs.
  • an anti-peeping effect can be achieved on both sides of the anti-peeping display; at the same time, due to the intermediate area of the illuminating surface of the anti-peeping display (main observation area)
  • the anti-peeping device for example, the grating mirror structure
  • the anti-peeping display provided by the embodiment of the present disclosure does not affect the viewing effect of the user in the main observation area while having the anti-peeping effect (as shown in FIG. 3). ).
  • a conventional method of implementing anti-peeping is to attach an anti-peeping display film to the display, and the anti-peeping display film is attached to the entire display panel.
  • this scheme has an anti-peeping effect, it also affects the observation effect of the user located in the main observation area due to the interference of the anti-peeping display film.
  • the anti-peeping display in the embodiments of the present disclosure can effectively alleviate or avoid this problem.
  • the brightness of the external light source may be adjusted such that the ratio between the brightness of the light emitted from the display panel (eg, from the polarizing plate of the liquid crystal display panel) and the brightness of the external light source is less than a preset value, such that The contrast of the area of the display against the voyeurizing perspective is less than the degree that the human eye can recognize, ensuring that the voyeur cannot see the content displayed by the display area involved in the anti-peeping view of the display.
  • the ratio between the luminance of the display panel in the display (for example, the brightness of the light exiting the polarizing plate) and the brightness of the light reflected by the grating mirror structure is less than a threshold value is advantageous for the anti-peep effect.
  • the grating mirror structure is located between the outermost layer (the cover glass layer) and the secondary outer layer (the polarizing plate) in the display, that is, the light emitted by the external light source only needs to pass through.
  • a layer of protective glass is emitted when it meets the grating mirror structure. Therefore, it can be considered that the brightness of the external light source is equal to the brightness of the light reflected by the grating mirror structure.
  • the brightness of a backlight in a liquid crystal display is usually 3,000 to 8,500 nits, and the transmittance of different displays is 3% to 7%.
  • the brightness of the panel of the display ie, human eye observation
  • the brightness of the panel is about 250 nit.
  • the human eye cannot see the content on the display.
  • the ratio between the brightness of the display panel and the brightness of the external light source is 10.
  • the threshold may be set to 10, and by adjusting the brightness of the external light source, the ratio between the brightness of the display panel of the display and the brightness of the external light source is less than 10, which is beneficial to prevent The effect of voyeurism.
  • the grating mirror structure when it is a liquid crystal display, the grating mirror structure may be disposed between the transparent glass layer and the color filter film, or may be disposed between the transparent glass layer and the color filter film, or Between the color filter film and the polarizing plate, and the like, the embodiment of the present invention does not limit this.
  • an external light source and a grating mirror structure are provided.
  • the grating type mirror structure can be controlled by the first controller to be in a deflected and reflective state, such that the grating mirror structure reflects the light of the external light source, and the reflection angle covers the desired anti-peeping angle (as shown in FIG. 1 or FIG. 2). .
  • the voyeur observes the display in the display area covered by the anti-peeping angle of view, the light of the external light source reflected by the grating mirror structure enters the user's eyes, and the user cannot see the display content on the display. That is: the anti-peeping effect is achieved.
  • the anti-peeping device includes a gate mirror structure 102 and a second coupled to the grating mirror structure. Controller (not shown).
  • the grid mirror structure is configured to rotate under control of the second controller to block light exiting from below the gate mirror structure 102 from exiting the grid mirror structure. In this way, the light emitted from the lower side of the grating mirror structure 102 is also prevented from reaching the voyeur.
  • the grating mirror structure refers to a gate structure composed of a plurality of impermeable elements spaced apart from each other with a gap between the opaque elements.
  • the opaque element 102 is shown schematically in FIG. Examples of opaque elements include, but are not limited to, opaque plastic articles, metals, and the like.
  • the grating mirror structure may also be the grating mirror structure described in the foregoing embodiments.
  • the second controller includes a control circuit, a motor, and a support structure for supporting the grid-type mirror structure, the motor being coupled to the support structure.
  • the motor can be rotated by the signal from the control circuit to drive the deflection of the grating mirror structure via the support structure.
  • the second controller can control the orientation of the grid mirror structure such that it is in a horizontal or vertical state.
  • the opaque elements in the grating mirror structure are in a horizontal state (also referred to as a closed state)
  • the anti-peeping device is applied to the display device, it is possible to make it difficult for the voyeur to see the information of the area covered by the grating mirror structure, thereby achieving the purpose of preventing voyeurism.
  • an embodiment of the present disclosure further provides an anti-peeping display device, which specifically includes the following components: a display panel for displaying an image; and an anti-peeping device according to the foregoing embodiment, the grid A type of mirror structure is attached to the display panel and covers at least a portion of the light exit surface of the display panel.
  • the above display panel includes, but is not limited to, a liquid crystal display panel, an organic light emitting diode display panel, and the like.
  • the display panel includes a liquid crystal layer, a backlight, and at least two light transmissive layers located on the liquid crystal layer away from the backlight.
  • the gate mirror structure in the anti-peeping device is disposed on any two light transmissive layers. between.
  • the two light transmissive layers comprise a polarizer, a cover glass layer.
  • the grid mirror structure is a grid mirror structure having a matte surface.
  • the liquid crystal display panel further includes a cover glass layer 103 as an outermost layer and a second outer layer transparent layer polarizing plate 104.
  • the gate mirror structure 102 is disposed on the polarizing plate 104 and the cover glass. Between layers 103.
  • the side of the grating mirror structure 102 away from the backlight is a mirror surface capable of reflecting light, and the other side adjacent to the backlight is a frosted structure.
  • the anti-peeping display includes two grating mirror structures 102; the two grating mirror structures 102 respectively occupy the left side portion and the right side portion of the light emitting surface of the display panel without occupying the middle portion thereof.
  • the second controller can control each of the two grating mirror structures 102 to be in a horizontal state (it can be considered that the grating mirror structure is in a closed state at this time), thereby blocking or hindering the light emerging from the liquid crystal layer from reaching the display.
  • the voyeur on both sides makes it impossible to see the contents displayed on the display panel, thereby achieving the anti-peep effect.
  • the backlight may be configured to increase the brightness according to the size ratio of the gate mirror structure in the closed state to the display area of the anti-peep monitor.
  • the closed mirror structure since the grating mirror structure is in a closed state when anti-peeping is required, the closed mirror structure not only blocks the light of the anti-peeping display area. It also reduces the brightness in the main observation area of the display, which affects the observation effect of the users in the main observation area.
  • the brightness of the backlight is increased such that the ratio between the brightness of the light emitted from the polarizing plate of the display panel and the brightness of the external ambient light is greater than or equal to a preset value.
  • the backlight is adjusted such that the ratio between the brightness of the light exiting the polarizer and the brightness of the external ambient light is greater than or equal to 10, thereby ensuring normal viewing by the user in the main viewing area of the display.
  • the embodiment of the present disclosure provides a control method, specifically for controlling the anti-peeping device and the anti-peeping display provided by the previous embodiment, thereby achieving an anti-peeping effect.
  • the control method specifically includes the following steps: controlling the rotation of the grating mirror structure in the anti-peeping device by the first controller, so that the light emitted by the external light source toward the grating mirror structure is performed by the grating mirror The structure is reflected to a first direction that is offset from a normal to a horizontal plane in which the grating mirror structure is located.
  • the control method provided by the embodiment of the present disclosure is based on the anti-peeping device and the anti-peeping display corresponding to the embodiment shown in FIG. 1 to FIG. 3, and the anti-peeping principle and the anti-peeping device or the anti-peeping display provided by the foregoing embodiments are protected. The principle of voyeurism is consistent and will not be repeated here.
  • the grating mirror structure can be controlled to a reflective state (reflecting light from the external light source);
  • the deflection angle of the mirror structure also adjusts the anti-peeping area of the display.
  • a further embodiment of the present disclosure provides yet another control method, which is further based on an anti-peeping device or an anti-peeping display as shown in FIG. 4 or FIG. 5, thereby achieving an anti-peeping effect.
  • the control method specifically includes the steps of: controlling, by the second controller, a gate mirror structure in the anti-peeping device to be in a closed state to block light emitted from a lower portion of the grating mirror structure from the gate type The mirror structure is shot.
  • embodiments of the present disclosure adjust the deflection angle of the grating mirror structure in the anti-peeping device such that the grating mirror structure is parallel to the respective light transmissive layers in the display (ie, the grid mirror structure is in a closed state).
  • the controlling method further comprises: increasing a brightness of the display panel according to a size ratio of a grating mirror structure in a closed state to a light emitting area of the light emitting surface of the display panel. .
  • the anti-peeping display in the embodiment shown in FIG. 2 or FIG. 3 by adjusting the deflection angle of the grating mirror structure, not only the grating mirror structure can be controlled to the deflection reflective state, but also the grid can be The type of mirror structure is controlled to a closed state, and therefore, the anti-peeping display described in the embodiment shown in Fig. 2 or Fig. 3 can implement two anti-peeping modes.

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Abstract

一种防偷窥装置、防偷窥显示器及控制方法。防偷窥装置包括：外置光源（101）和栅型镜面结构（102），以及与栅型镜面结构（102）相耦接的第一控制器。外置光源（101）被配置成朝栅型镜面结构（102）发光，第一控制器被配置成控制栅型镜面结构（102）转动，以使得外置光源（101）朝栅型镜面结构（102）发射的光由栅型镜面结构（102）反射至第一方向，第一方向偏离与栅型镜面结构（102）所在的水平面的法线。

Description

防偷窥装置、防偷窥显示器及控制方法
相关申请的交叉引用
本申请要求于2017年10月23日向中国专利局提交的专利申请201710993518.3的优先权利益，并且在此通过引用的方式将该在先申请的内容并入本文。
技术领域
本公开涉及显示领域，具体而言，涉及防偷窥装置、防偷窥显示器及控制方法。
背景技术
随着显示技术的不断发展，智能显示屏被应用在用户日常生活的许多方面，例如，触屏手机、触屏电视机、ATM机(自动柜员机)等等。智能显示屏的诞生给用户也带来了多方面的便利，例如，使得用户可以自主执行一些相关操作；再例如，使得显示器本身更加轻薄、美观，例如，触屏手机、平板电脑等。
虽然目前的显示技术已相对成熟，但用户对于显示器的要求仍在不断提高。例如，在一些情况下，用户在显示器上所执行的相关操作或显示器显示内容时，并不希望其他用户看到所显示的内容，例如，用户在ATM机(自动柜员机)上输入密码的操作，由于关系到用户的财产安全，用户不希望被其他用户看到。
发明内容
本公开的各实施例提供了一种防偷窥装置，包括：外置光源和栅型镜面结构，以及与所述栅型镜面结构相耦接的第一控制器。外置光源被配置成朝所述栅型镜面结构发光，第一控制器被配置成控制栅型镜面结构转动，以使得所述外置光源朝所述栅型镜面结构发射的光由所述栅型镜面结构而反射至第一方向，所述第一方向偏离与所述栅型镜面结构所在的水平面的法线。
在一些实施例中，栅型镜面结构靠近所述外置光源的一侧为光反射面。
本公开的另一实施例提供了一种防偷窥显示器，包括：用于显示图像的显示面板；和如前述实施例所述的防偷窥装置。栅型镜面结构附接至显示面板并覆盖显示面板的出光面的至少一部分，防偷窥装置 的外置光源独立于显示面板，并且所述外置光源和所述显示面板的连接线与所述出光面的沿着其出光方向的法线之间的角度不大于90度，且所述外置光源在所述出光面所在平面上的正投影与所述出光面无交叠。
在一些实施例中，显示面板为液晶显示面板，所述防偷窥显示器还包括处于液晶显示面板的偏光板外侧的防护玻璃层，所述栅型镜面结构设置于所述偏光板与防护玻璃层之间。
在一些实施例中，防偷窥显示器包括两个外置光源和两个栅型镜面结构，所述两个栅型镜面结构分别覆盖所述显示面板出光面的彼此相对的两个侧边部分，而不覆盖所述显示面板出光面的中间部分。两个外置光源被定位成分别朝所述两个栅型镜面结构发光。
在一些实施例中，所述两个栅型镜面结构占所述防偷窥显示器出光面的发光面积的四分之一至二分之一。
在一些实施例中，每个栅型镜面结构的宽度为所述防偷窥显示器的发光区域的宽度的四分之一至二分之一。
在一些实施例中，外置光源被配置成使得从所述偏光板出射的光的亮度与所述外置光源亮度之间的比例小于阈值。
本公开的又一实施例提供了一种防偷窥装置，包括：栅型镜面结构和与所述栅型镜面结构相耦接的第二控制器，所述栅型镜面结构被配置成在需要防窥时由所述第二控制器控制处于闭合状态，以阻碍从所述栅型镜面结构的下方出射的光线从所述栅型镜面结构射出。
本公开的另一实施例提供了一种防偷窥显示器，包括：用于显示图像的显示面板；和如之前实施例所述的防偷窥装置，所述栅型镜面结构附接至所述显示面板并覆盖显示面板的出光面的至少一部分。
在一些实施例中，所述显示面板包括液晶层、背光源、以及位于液晶层之上远离背光源的至少两个透光层，其中所述防偷窥装置中的栅型镜面结构设置于任意两个透光层之间。
在一些实施例中，栅型镜面结构的一侧为磨砂结构。
在一些实施例中，所述防偷窥显示器包括两个栅型镜面结构，所述两个栅型镜面结构分别覆盖所述显示面板出光面的彼此相对的两个侧边部分，而不覆盖所述显示面板出光面的中间部分。
在一些实施例中，背光源被配置成根据处于闭合状态的栅型镜面 结构占所述显示面板出光面发光面积的尺寸比例而对应增加亮度。
本公开的又一实施例提供了一种基于如上述实施例所述的防偷窥装置或防偷窥显示器的控制方法，包括：通过所述第一控制器控制防偷窥装置中的栅型镜面结构转动，以使得所述外置光源朝所述栅型镜面结构发射的光由所述栅型镜面结构而反射至第一方向，所述第一方向偏离与所述栅型镜面结构所在的水平面的法线。。
替代性地，控制方法可基于具有另一不同结构的防偷窥装置或防偷窥显示器，此时，控制方法包括：通过所述第二控制器控制所述防偷窥装置中的栅型镜面结构处于闭合状态，以阻碍从所述栅型镜面结构的下方出射的光线从所述栅型镜面结构射出。
进一步地，在一些实施例中，控制方法还包括：根据所述闭合状态的栅型镜面结构占所述显示面板出光面发光面积的尺寸比例增加显示面板的亮度。
本公开附加的方面和优点将在下面的描述中部分给出，这些将从下面的描述中变得明显，或通过本公开的实践了解到。
附图说明
本公开上述的和/或附加的方面和优点从下面结合附图对实施例的描述中将变得明显和容易理解，其中：
图1为本公开的一个实施例提供的防偷窥装置的结构示意图；
图2为本公开的一个实施例提供的防偷窥显示器的结构示意图；
图3为本公开另一实施例提供的防偷窥显示器的结构示意图；
图4为本公开另一实施例提供的防偷窥装置的结构示意图；
图5为本公开另一实施例提供的防偷窥显示器的结构示意图；
具体实施方式
下面详细描述本公开的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本公开，而不能构成为对本申请保护范围的限制。
本技术领域技术人员可以理解，除非特意声明，这里使用词语“一”、“一个”、“所述”和“该”等限定的技术特征并不排除包括多个这样的技术特征。应该进一步理解的是，本公开的说明书中使用的措辞“包括”是指在该措辞之前的主体具有在该措辞之后列出的特征、数字、步骤、操 作、元件和/或组件，但是并不排除存在或添加一个或多个其他的特征、数字、步骤、操作、元件、组件和/或它们的组合。应该理解，当我们称元件被“连接”或“耦接”到另一元件时，它可以直接连接或耦接到其他元件，或者也可以存在中间元件。此外，这里使用的“连接”或“耦接”可以包括无线连接或无线耦接。这里使用的措辞“和/或”包括一个或更多个所列出的项或这些项的全部或这些项中的任意项的任意组合。
本技术领域技术人员可以理解，除非另外定义，这里使用的所有术语(包括技术术语和科学术语)，具有与本发明所属领域中的普通技术人员的一般理解相同的意义。还应该理解的是，诸如通用字典中定义的那些术语，应该被理解为具有与本文上下文中的意义一致的意义，并且除非像这里一样被特定定义，否则不会用理想化或过于正式的含义来解释。
为了实现显示装置具备防偷窥功能，可以在显示器的表面贴附防偷窥显示膜。但是，这种防偷窥显示膜的制作需要相对较高的成本，这种成本也随着显示装置的显示面积的增大而增加。而且，这种偷窥显示膜贴附在显示器上会对显示装置的正常显示效果造成一定影响。
下面结合附图具体介绍本公开各实施例的技术方案。
根据本公开一个实施例提供的防偷窥装置的结构示意图如图1所示，该防偷窥装置具体包括以下部件：外置光源101和栅型镜面结构102，以及与栅型镜面结构102相耦接的第一控制器(图1中未示出)。外置光源101被配置成朝栅型镜面结构发光，第一控制器被配置成控制栅型镜面结构102转动，以使得所述外置光源朝所述栅型镜面结构发射的光由所述栅型镜面结构而反射至第一方向，所述第一方向偏离与所述栅型镜面结构所在的水平面的法线。
参照图1所示的示例，在图1中，栅型镜面结构所在的水平面的法线方向即为图1中的竖直方向，因此，上述的第一方向偏离于竖直方向，这个方向通常也是指向偷窥者所在的位置，因为偷窥者一般处于正常使用者的侧旁。相应地，可以使得外置光源101朝栅型镜面结构102发射的光由栅型镜面结构而反射至偷窥者(例如，图1中示意性地示出的偷窥者的眼睛B)。
在本公开的实施例中，栅型镜面结构指的是由多个彼此隔开的具有反射特性的光学元件组成的光学结构，这些光学元件之间具有缝隙。 图1中以粗实线示意性地示出了若干光学元件。能够理解到的是，该光学元件包括但不限于平面镜。
在一些实施例中，第一控制器包括控制电路、电机以及用于支撑栅型镜面结构的支撑结构，电机与支撑结构耦接。电机可以在控制电路发出的信号的作用下旋转，从而经由支撑结构而带动栅型镜面结构偏转。这样，第一控制器可以控制栅型镜面结构的转动方向和幅度，从而控制栅型镜面结构反射光的方向。当反射光朝向偷窥者的眼睛时，会影响或降低偷窥者的视觉效果，从而达到防偷窥的目的。
在一些实施例中，栅型镜面结构102靠近外置光源101的一侧为光反射面。
本公开实施例提供的防偷窥装置的防偷窥原理也可参照图1来说明。如图1所示，可以先通过第一控制器将栅型镜面结构102控制为使得其光反射面朝向外置光源，外置光源101发出的光线照射到栅型镜面结构102后，栅型镜面结构102将光线反射出去，反射出的光线进入偷窥者的眼睛。当进入偷窥者眼睛的光线的亮度到达到预设值时，偷窥者将看不清应用该防偷窥装置的显示器的显示内容，从而达到防偷窥的效果。
基于相同的公开构思，本公开实施例还提供一种防偷窥显示器，该防偷窥装置具体包括以下部件：用于显示图像的显示面板和如前述实施例所描述的防偷窥装置。栅型镜面结构附接至显示面板并覆盖显示面板的出光面的至少一部分，防偷窥装置的外置光源独立于所述显示面板、并处于所述显示面板的出光面的上方。能够理解到的是，根据本公开的该实施例，显示面板包括但不限于液晶显示面板和有机发光二极管显示面板。
在一些实施例中，如图2所示，防偷窥显示器为液晶显示器，液晶显示器包括背光源、液晶层、偏光板104。在该实施例中，防偷窥显示器还包括防护玻璃层103，栅型镜面结构102设置于偏光板104与防护玻璃层103之间，外置光源101独立于液晶显示面板，并且外置光源的位置不低于显示面板的出光面。
在一些实施例中，栅型镜面结构102远离背光源的一侧为能够发射光线的镜面结构，靠近背光源的另一侧为磨砂结构。栅型镜面结构的设置并不限于图2所示的示例，栅型镜面结构可以布置在液晶显示 面板的任何适当的位置，只要在从栅型镜面结构到防偷窥显示器的出光面的光路上不存在遮光层即可。根据本公开的另一实施例，如图3所示，防偷窥显示器包括两个外置光源101和两组栅型镜面结构102，两组栅型镜面结构102分别覆盖显示面板的出光面的彼此相对的两个侧边部分(例如，图3中所示的左侧部分和右侧部分)，而不覆盖显示面板的出光面的中间部分。两个外置光源101分别设置于显示面板的出光面的左上方和右上方。与图2的实施例类似，栅型镜面结构102可设置于防护玻璃层103的下面。
在图3的实施例中，液晶显示面板的偏光片除了其中间部分，液晶显示面板的偏光片的左侧部分和右侧部分均设置有栅型镜面结构，以及在这两组栅型镜面结构的上方设置有外置光源。与前述图2所示实施例中防偷窥装置的防偷窥的原理一致，通过第一控制器可使得位于显示器的出光面的左侧部分和右侧部分的栅型镜面结构处于适当的偏转状态，以分别反射来自于两个外置光源的光，反射出的光线进入偷窥者的眼睛，从而达到防偷窥的效果。此时，在显示器的左右两侧形成防偷窥区域，位于显示器的出光面的左侧和右侧的偷窥者均不能清楚地看到显示器所显示的内容，进一步增强了防偷窥效果。此外，从图2和图3所示的实施例，可以理解到，防偷窥装置101的外置光源独立于显示面板，外置光源101和显示面板的连接线与显示面板出光面的沿着其出光方向的法线之间的角度不大于90度，且外置光源在出光面所在平面上的正投影与出光面无交叠。
在一些实施例中，上述两组栅型镜面结构占防偷窥显示器的出光面的发光面积的四分之一至二分之一。例如，每个栅型镜面结构的宽度为防偷窥显示器出光面的发光区域的宽度的四分之一至二分之一。在该实施例中，“宽度”指的是栅型镜面结构安装于显示器之后，栅型镜面结构或防偷窥显示器出光面的发光区域在沿同一方向的尺寸，例如，对于图3的示例而言，宽度指的是栅型镜面结构或防偷窥显示器出光面的发光区域在水平方向上的尺寸。
在实际应用中，可根据实际需求设置栅型镜面结构占显示器出光面的发光面积的比例。通过调节栅型镜面结构占防偷窥显示器出光面的发光面积的比例，可以在防偷窥显示器的两侧实现不能程度的防偷窥的效果；同时，由于防偷窥显示器出光面的中间区域(主观测区) 并没有设置防偷窥装置(例如，栅型镜面结构)，因此，本公开实施例提供的防偷窥显示器在具有防偷窥效果的同时，不影响主观测区用户的观看效果(如图3所示)。
常规的实现防偷窥的方法是在显示器中贴附防偷窥显示膜，防偷窥显示膜是贴附在整个显示面板上。这种方案虽然起到了防偷窥的效果，但由于防偷窥显示膜的干扰，也会影响位于主观测区的用户的观测效果。本公开实施例中防偷窥显示器可有效地减轻或避免这个问题。
在另外的实施例中，可以调节外置光源的亮度，使得从显示面板(例如，从液晶显示面板的偏光板)出射的光的亮度与外置光源亮度之间的比例小于预设值，使得显示器的防偷窥视角涉及的区域的对比度小于人眼可以识别的程度，确保偷窥者看不清显示器中防偷窥视角涉及的显示区域所显示的内容。
显示器中显示面板的发光亮度(例如，出射偏光板的光的亮度)与通过栅型镜面结构反射出光线的亮度之间的比例小于阈值对于防偷窥效果是有利的。对于图2或图3所示的实施例，栅型镜面结构位于显示器中最外层(防护玻璃层)和次外层(偏光板)之间，即：外置光源发出的光只需透过一层防护玻璃层与栅型镜面结构相遇发生发射，因此，这里可认为外置光源的亮度与通过栅型镜面结构反射出的光的亮度是相等的。
例如，在实际应用中，液晶显示器中背光源的亮度通常为3000～8500尼特(nit)，不同显示器的透光率为3％～7％，这样，显示器的面板亮度(即：人眼观测到的面板亮度)为250nit左右。此时，当外置光源的亮度为25nit左右时，人眼就看不清显示器上的内容，此时，显示面板的亮度与外置光源的亮度之间的比例为10。因此，在一些实施例中，可将上述阈值设置为10，通过调节外置光源的亮度，使得显示器的显示面板的亮度与外置光源的亮度之间的比值小于10，即可有利于实现防偷窥的效果。
对于本公开实施例提供的防偷窥显示器，当其为液晶显示器时，栅型镜面结构除了设置在防护玻璃层和偏光板之间，还可以设置在透明电极层和彩色滤光膜之间，或者彩色滤光膜和偏光板之间，等等，本发明实施例不对此构成限制。
综上，在本公开以上实施例提供的防偷窥装置和防偷窥显示器中， 设置有外置光源和栅型镜面结构。通过第一控制器可控制该栅型镜面结构处于偏转反光状态，使得该栅型镜面结构反射外置光源的光线，并使得反射角度覆盖期望的防偷窥视角(如图1或图2所示)。在实际应用中，当偷窥者在防偷窥视角所覆盖的显示区域观测显示器时，通过栅型镜面结构反射出的外置光源的光线会进入用户眼睛，用户将无法看清显示器上的显示内容，即：实现了防偷窥的效果。
图4示意性地示出了根据本公开的另一实施例的防偷窥装置的结构，如图4所示，防偷窥装置包括栅型镜面结构102和与栅型镜面结构相耦接的第二控制器(图中未示出)。栅型镜面结构被配置成在第二控制器的控制下转动，以阻碍从栅型镜面结构102的下方出射的光线从所述栅型镜面结构射出。这样，也阻碍了从栅型镜面结构102的下方出射的光线到达偷窥者。在本公开的实施例中，栅型镜面结构指的是由多个彼此隔开的不透元件组成的栅型结构，这些不透光元件之间具有缝隙。图4中示意性地示出了不透光元件102。不透光元件的示例包括但不限于不透光塑料制品、金属等。在另一实施例中，栅型镜面结构也可以是前述实施例中所述的栅型镜面结构。
在一些实施例中，第二控制器包括控制电路、电机以及用于支撑栅型镜面结构的支撑结构，电机与支撑结构耦接。电机可以在控制电路发出的信号的作用下旋转，从而经由支撑结构而带动栅型镜面结构偏转。这样，第二控制器可以控制栅型镜面结构的取向，使得其处于水平状态或竖直状态。当栅型镜面结构中的不透光元件均处于水平状态(也可称之为闭合状态)时，就可以至少部分地阻碍从栅型镜面结构下方出射的光线到达偷窥者的眼睛(例如，图4中的E所示)。当该防偷窥装置应用于显示装置是时，就可以使得偷窥者难以看清由栅型镜面结构覆盖的区域的信息，从而达到防偷窥的目的。
基于相同的公开构思，本公开实施例还提供一种防偷窥显示器，该防偷窥装置具体包括以下部件：用于显示图像的显示面板；和如前述实施例所述的防偷窥装置，所述栅型镜面结构附接至所述显示面板并覆盖显示面板的出光面的至少一部分。
上述显示面板包括但不限于液晶显示面板、有机发光二极管显示面板等。在一个实施例中，显示面板包括液晶层、背光源、以及位于液晶层之上远离背光源的至少两个透光层，防偷窥装置中的栅型镜面 结构设置于任意两个透光层之间。在一些实施例中，这两个透光层包括偏光片、防护玻璃层。在一些实施例中，栅型镜面结构是具有磨砂表面的栅型镜面结构。
在一些实施例中，如图5所示，液晶显示面板还包括作为最外层的防护玻璃层103、次外层透光层偏光板104，栅型镜面结构102设置于偏光板104与防护玻璃层103之间。在该实施例中，栅型镜面结构102远离背光源的一侧为能够反射光线的镜面，靠近背光源的另一侧为磨砂结构。
如图5所示，本公开实施例提供的防偷窥显示器包括两个栅型镜面结构102；两个栅型镜面结构102分别占据显示面板出光面的左侧部分和右侧部分，而不占据其中间部分。第二控制器可以控制这两个栅型镜面结构102中的每个反射镜处于水平状态(可认为栅型镜面结构此时处于闭合状态)，从而遮挡或阻碍从液晶层出射的光到达处于显示器两侧的偷窥者，使其不能看清楚显示面板所显示的内容，从而实现防窥效果。
在防偷窥显示器的显示面板包括背光源的情形中，背光源可被配置成根据处于闭合状态的栅型镜面结构占防偷窥显示器显示面积的尺寸比例而增加亮度。具体地，对于本公开图5所示实施例提供的防偷窥显示器，由于在需要防偷窥时栅型镜面结构处于闭合状态，该处于闭合状态的栅型镜面结构不仅遮挡了防偷窥显示区域的光线，还减小了显示器中主观测区中亮度，影响了主观测区用户的观测效果。因此，根据栅型镜面结构占防偷窥显示器显示面积的尺寸比例而对应增加背光源的亮度可补偿主观测区由于栅型镜面结构遮挡而损失的亮度。具体地，增大背光源的亮度，使得从显示面板的偏光板出射的光的亮度与外部环境光亮度之间的比例大于或等于预设值。在一些实施例中，对背光源进行调整，使得出射偏光板的光的亮度与外部环境光亮度之间的比例大于或等于10，从而保证显示器中主观测区用户正常观看。
基于相同的发明构思，本公开实施例提供了一种控制方法，具体用于控制之前实施例提供的防偷窥装置和防偷窥显示器，从而实现防偷窥的效果。该控制方法具体包括以下步骤：通过所述第一控制器控制防偷窥装置中的栅型镜面结构转动，以使得所述外置光源朝所述栅型镜面结构发射的光由所述栅型镜面结构而反射至第一方向，所述第 一方向偏离与所述栅型镜面结构所在的水平面的法线。本公开的该实施例提供的控制方法是基于图1-图3所示实施例对应的防偷窥装置和防偷窥显示器，防偷窥的原理与前述实施例提供的防偷窥装置或防偷窥显示器的防偷窥原理一致，这里不再赘述。
特别地，通过调节防偷窥装置中栅型镜面结构的偏转角度，与外置光源相互配合，可将栅型镜面结构控制到反光状态(反射来自于外置光源的光)；同时，通过调节栅型镜面结构的偏转角度，还可以调节显示器中的防偷窥的区域。
在实际应用中，通过调节栅型镜面结构的偏转角度，可实现0～90度的防窥角度，只要保证不影响显示器中主观测区用户的观测效果即可。本公开的另外的实施例提供了又一种控制方法，还控制方法基于如图4或图5所示的防偷窥装置或防偷窥显示器，从而实现防偷窥的效果。该控制方法具体包括以下步骤：通过所述第二控制器控制所述防偷窥装置中的栅型镜面结构处于闭合状态，以阻碍从所述栅型镜面结构的下方出射的光线从所述栅型镜面结构射出。特别地，本公开实施例通过调节防偷窥装置中栅型镜面结构的偏转角度，使得栅型镜面结构平行于显示器中的各透光层(即：栅型镜面结构处于闭合状态)。
在一些实施例中，该控制方法还包括：根据处于闭合状态的栅型镜面结构占所述显示面板出光面发光面积的尺寸比例增加显示面板的亮度。。
能够理解到的是，对于如图2或图3所示实施例中的防偷窥显示器，通过调节栅型镜面结构的偏转角度，不仅可以将栅型镜面结构控制到偏转反光状态，也可以将栅型镜面结构控制到闭合状态，因此，图2或图3所示实施例所述的防偷窥显示器可以实现两种防偷窥模式。
上所述仅是本公开的部分实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本公开原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本申请的保护范围。

Claims (17)

  1. 一种防偷窥装置，包括：
    外置光源和栅型镜面结构，以及与所述栅型镜面结构相耦接的第一控制器，
    所述外置光源被配置成朝所述栅型镜面结构发光，所述第一控制器被配置成控制所述栅型镜面结构转动，以使得所述外置光源朝所述栅型镜面结构发射的光由所述栅型镜面结构而反射至第一方向，所述第一方向偏离与所述栅型镜面结构所在的水平面的法线。
  2. 根据权利要求1所述的防偷窥装置，其中所述栅型镜面结构靠近所述外置光源的一侧为光反射面。
  3. 一种防偷窥显示器，包括：
    用于显示图像的显示面板；和
    如权利要求1或2所述的防偷窥装置，其中所述栅型镜面结构附接至所述显示面板并覆盖显示面板的出光面的至少一部分，所述防偷窥装置的外置光源独立于所述显示面板，所述外置光源和所述显示面板的连接线与所述出光面的沿着其出光方向的法线之间的角度不大于90度，且所述外置光源在所述出光面所在平面上的正投影与所述出光面无交叠。
  4. 根据权利要求3所述的防偷窥显示器，其中所述显示面板为液晶显示面板，所述防偷窥显示器还包括处于液晶显示面板的偏光板外侧的防护玻璃层，所述栅型镜面结构设置于所述偏光板与防护玻璃层之间。
  5. 根据权利要求3所述的防偷窥显示器，其中所述防偷窥显示器包括两个外置光源和两个栅型镜面结构，
    所述两个栅型镜面结构分别覆盖所述显示面板出光面的彼此相对的两个侧边部分，而不覆盖所述显示面板出光面的中间部分,
    其中所述两个外置光源被定位成分别朝所述两个栅型镜面结构发光。
  6. 根据权利要求5所述的防偷窥显示器，其中所述两个栅型镜面结构占所述防偷窥显示器出光面的发光面积的四分之一至二分之一。
  7. 根据权利要求6所述的防偷窥显示器，其中每个栅型镜面结构 的宽度为所述防偷窥显示器的发光区域的宽度的四分之一至二分之一。
  8. 根据权利要求4所述的防偷窥显示器，其中所述外置光源被配置成使得从所述偏光板出射的光的亮度与所述外置光源亮度之间的比例小于阈值。
  9. 一种防偷窥装置，包括：
    栅型镜面结构和与所述栅型镜面结构相耦接的第二控制器，
    所述栅型镜面结构被配置成在需要防窥时由所述第二控制器控制处于闭合状态，以阻碍从所述栅型镜面结构的下方出射的光线从所述栅型镜面结构射出。
  10. 一种防偷窥显示器，包括：
    用于显示图像的显示面板；和
    如权利要求9所述的防偷窥装置，其中所述栅型镜面结构附接至所述显示面板并覆盖显示面板的出光面的至少一部分。
  11. 根据权利要求10所述的防偷窥显示器，其中所述显示面板包括液晶层、背光源、以及位于液晶层之上远离背光源的至少两个透光层，其中所述防偷窥装置中的栅型镜面结构设置于任意两个透光层之间。
  12. 根据权利要求10所述的防偷窥装置，其中所述栅型镜面结构的一侧为磨砂结构。
  13. 根据权利要求11所述的防偷窥显示器，其中所述防偷窥显示器包括两个栅型镜面结构，所述两个栅型镜面结构分别覆盖所述显示面板出光面的彼此相对的两个侧边部分，而不覆盖所述显示面板出光面的中间部分。
  14. 根据权利要求12所述的防偷窥显示器，其中所述背光源被配置成根据处于闭合状态的栅型镜面结构占所述显示面板出光面发光面积的尺寸比例而对应增加亮度。
  15. 一种基于如上述权利要求1-2中任一防偷窥装置或如上述权利要求3-8中任一防偷窥显示器的控制方法，包括：
    通过所述第一控制器控制防偷窥装置中的栅型镜面结构转动，以使得所述外置光源朝所述栅型镜面结构发射的光由所述栅型镜面结构而反射至第一方向，所述第一方向偏离与所述栅型镜面结构所在的水 平面的法线。
  16. 一种基于如上述权利要求9防偷窥装置或如上述权利要求10-14中任一防偷窥显示器的控制方法，包括：
    通过所述第二控制器控制所述防偷窥装置中的栅型镜面结构处于闭合状态，以阻碍从所述栅型镜面结构的下方出射的光线从所述栅型镜面结构射出。
  17. 根据权利要求16所述的控制方法，还包括：
    根据所述闭合状态的栅型镜面结构占所述显示面板出光面发光面积的尺寸比例增加显示面板的亮度。
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CN115035806B (zh) * 2022-08-02 2022-11-25 惠科股份有限公司 防窥组件的制造方法、防窥组件、防窥方法及显示设备

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